package servlet;

import pojo.User;
import service.UserService;
import service.impl.UserServiceimpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet(urlPatterns = {"/user"})
public class UserServlet extends HttpServlet {
    //创建业务层对象 多态
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        UserService userService = new UserServiceimpl();
        req.setCharacterEncoding("utf-8");
        //resp.setCharacterEncoding("utf-8");
        String action = req.getParameter("action");
       if ("user".equals(action)) {
           String name = req.getParameter("name");
           String pass = req.getParameter("pass");
            User condition=new User(name, pass);
            List<User> users = userService.findAll(condition);
           // 把数据放到请求域中
            req.setAttribute("users", users);//此处打断点用Debug启动
            req.setAttribute("condition",condition);
           // 在哪个页面显示数据
            req.getRequestDispatcher("/user.jsp").forward(req, resp);
        } else if ("delete".equals(action)) {
            String sid = req.getParameter("id");
            int id=Integer.parseInt(sid);
            //根据id查询用户信息
            int result=userService.deleteUserById(id);
            if(result>0){
                //重定向,再次查询
                resp.sendRedirect("user?action=user");
            }
        } else if ("update".equals(action)) {
            String sid=req.getParameter("id");
            int id=Integer.parseInt(sid);
            //int id=Integer.parseInt(req.getParameter("id"));
            //拿到页面传递的参数
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");
            int result=userService.updateUser(new User(id,name,pass));
            //重定向,再次查询
            if(result>0) {
                resp.sendRedirect("user?action=user");
            }
        } else if ("add".equals(action)) {
            //拿到页面传递的参数
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");
            int result = userService.addUser(new User(name, pass));
            //重定向,再次查询
            if(result>0) {
                resp.sendRedirect("user?action=user");
            }
        } else if ("toupdate".equals(action)) {
            //拿到页面传递的参数
            String sid = req.getParameter("id");

            int id=Integer.parseInt(sid);

            //根据id查询用户信息
            User user=userService.findById(id);
            //将查询到的用户信息存储到作用域中
            req.setAttribute("user",user);
            req.getRequestDispatcher("update.jsp").forward(req,resp);
        }
    }
}
